感应电机无速度传感器矢量控制的速度估算器研究

基于转子磁通空间矢量的MRAC速度估算器 ,提出了通过改进的感应电机模型得到的速度估算器 ,配合改进的间接矢量控制器结构以提高估算器的精度。还研究了对主磁通饱和进行补偿的速度估算器 ,提出了一种新型的速度估算器。仿真研究结果证明该速度估算器具有良好的补偿效果

Research of a Speed Estimator for Sensorless Vector Control of Induction Machines

This paper concentrates on one of the most frequently utilised schemes, in which speed is estimated using model reference adaptive control approach (MRAC) on the basis of two estimated values of the rotor flux space vector. An attempt is made to improve the accuracy of the spped estimation by appropriate modification of the speed estimator and the indirect vector controller structures, using modified induction motor models. A speed estimator is proposed with compensation of main flux saturation. A novel structure of the speed estimator is developed for the cases and is applied in conjunction with the appropriate modified form of the indirect rotor flux oriented controller. Excellent compensation capability is demonstrated in the cases by performing extensive simulation studies.